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Fabrication of FePt nanowires through pulsed electrodeposition into nanoporous alumina templates

Title
Fabrication of FePt nanowires through pulsed electrodeposition into nanoporous alumina templates
Type
Article in International Scientific Journal
Year
2022
Authors
Magalhaes, R
(Author)
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proenca, m. p.
(Author)
FCUP
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araujo, j. p.
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FCUP
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Nunes, C
(Author)
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Journal
Title: Applied NanoscienceImported from Authenticus Search for Journal Publications
Vol. 12
Pages: 3573-3584
ISSN: 2190-5509
Publisher: Springer Nature
Other information
Authenticus ID: P-00W-GZP
Abstract (EN): One-dimensional magnetic nanostructures have been emerging as promising nanomaterials for biomedical applications. Among those types of nanoarchitectures, FePt nanowires are particularly interesting; since they are highly biocompatible and chemically inert, their magnetic properties can be tuned by controlling not only the atomic ratio of the two elements in the alloy structure but also the nanowire's dimensions, and they have a high magnetic anisotropy. In this work, we report the fabrication of such nanostructures through pulsed electrodeposition into nanoporous aluminium oxide templates. Using this approach, we were able to control the composition of the produced nanoarchitectures by adjusting the thickness of the barrier layer, which is located at the bottom of the template, and the current density applied during the electrodeposition process. The obtained nanostructures exhibited a heterogeneous length distribution when Pt was present. Moreover, their magnetic characterization revealed an increase of the magnetic hysteresis, coercivity, remanence, and saturation field as the Fe atomic percent got higher. Furthermore, hysteresis loops of FePt nanowire arrays were simulated and compared with the experimental measurements. Such comparison suggested that the nanostructures with Pt in their composition might have different stoichiometries along their length.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 12
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